Greater London · England
Window & door mastic in Selhurst, Greater London
Window and door frames in Selhurst need attention? We cut out the old, prepare the joints and apply the right sealant.
- Draughty joints inside around the window
- Cold air getting in at the frame edge
- Mastic that is falling out in pieces
Landlords, agents and businesses in Selhurst
If you manage several properties in or around Selhurst, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and photos by email help.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll quote.
Window mastic in Selhurst
The new joint doesn’t have to be white. We can seal in white, brown, anthracite grey, black or clear, so the line suits the frame instead of standing out. If you have rain getting in at the frame or under the sill and draughty joints inside around the window, we can help, whatever the surface.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. Over the years, the sealant around them shrinks, cracks and pulls away, letting in draughts and water.
The work is covered for a year after we finish. If anything is not right with it, call 0345 464 0079 or email us.
- Where
- Selhurst (SE25, SE20, CR0)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Towns and villages near Selhurst
More services for Selhurst
Your questions about window mastic in Selhurst
Is parking a problem for a job in Selhurst?
Parking in Selhurst, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
Can you do window mastic in Selhurst?
Yes. Our work covers London and the South East, and Selhurst is part of that. You can phone 0345 464 0079 or email us and tell us what needs doing, and we will give you a clear price.
Will new mastic stop draughts?
If the draught is coming in around the frame, yes. If it’s coming through the window seals, we’ll tell you.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Is the new sealant paintable?
Silicone generally will not take paint. Let us know beforehand, and we will use a paintable product where it suits.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Can tenants book the work?
We are happy to deal with the tenant, landlord or agent. Get your landlord’s agreement first.
Do you work for hotels and businesses?
Yes. We’ve worked for hotels, offices and other businesses.
Quotes for window mastic in Selhurst
The quote reflects the job in front of us. We take into account:
- The number of rooms or windows
- Any mould that needs treating
- The size of the job
- Whether old sealant or filler has to be cut out
What it costs depends on the amount of work, how much old material has to come out and how easy the joints are to reach. We give a clear quote before work begins.
Asking for a quote
You don’t need to know the technical terms. It helps if you can tell us:
- Photos by email, if that’s easy
- Any access issues, like height or stairs
- Any previous sealing or DIY work
- How many joints, rooms or windows are involved
Getting a quote is simple: tell us what needs doing and where and its rough size. Photos by email help us understand the job, and we’ll come back to you with a quote.
Window mastic in Selhurst: local notes
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. In a converted house or block, who looks after the windows depends on the lease, so check that before booking.
Selhurst is in London, so parking needs planning: let us know about parking bays, permits or a driveway. If you look after a building such as St Mark's Church of England Primary Academy, larger buildings have plenty of frames, and the mastic around each one ages.
Selhurst is about 5 miles south-east of Stockwell, in Greater London. Our applicators cover window mastic for homes and businesses in Selhurst. Across Greater London, we cover 764 places, and Selhurst is one of them. We also work in London, about 7 miles from Selhurst.
Jobs for window mastic in SE25, SE20 and CR0 works the same way as everywhere else we cover. We cover properties on Park Road, Court Road and Dixon Road. Selhurst sits on or near the A213, so getting to you is simple. Other places close to Selhurst include South Norwood (1 mile north), Woodside (1 mile south), Ashburton (1 mile south), Elmers End (1 mile east) and Addiscombe (1 mile south). We also work in nearby towns such as London (7 miles north), City of Westminster (9 miles north-west), Marylebone (9 miles north), Kensington (9 miles north-west), St Pancras (9 miles north) and Shoreditch (9 miles north).
Around Selhurst
Locally, jobs take us to homes and businesses close to Harris Academy South Norwood, South Norwood Recreation Ground and The Albion pub. Selhurst has its own railway station: Norwood Junction station. Nearby you will also find Croydon University Hospital (1.7 miles south-west) and Crystal Palace Museum (1.4 miles north). Open spaces near Selhurst include Duppas Hill and Dulwich Upper Wood.
Do you need window mastic in Selhurst?
Older frames were often sealed with products that set hard. Once it’s rigid, every bit of frame movement pulls at it, and a gap opens along one edge.
Keep an eye out for these signs:
- A bead that doesn’t match the frame
- Cracked internal joints between frame and plaster
- Old mastic that has gone black or come away
- Cold air getting in at the frame edge
In the older streets around Church of St Mark, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Questions to ask before booking
- How much experience the applicator has
- Whether you can choose the colour
- Whether all the old sealant comes out first
- What insurance they hold
How it works
We bring everything the job needs with us. After a quick look at the joints together, the area is protected and the work begins. Most jobs take anything from an hour or two to a full day, depending on how many frames there are. In a London area like Selhurst, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- We check each frame and agree which ones need doing.
- The old mastic is cut out and the surfaces cleaned back.
- Deep gaps are filled with backing rod to set the depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- We clear up and check every joint is fully closed.
Preparing for the visit
- Let us know about earlier repairs to the joints
- Mention any parking rules near the property
- Mention any leaks or damp you’ve noticed
Ask for a quote
Want a quote for window mastic? Please phone 0345 464 0079 or send us an email and tell us about the job. We’ll explain what we’d do and give you a clear price before work begins.
Advice
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Broken hinges, locks or handles
- Rotten timber, which needs a joiner first
- Misting between the panes of a double-glazed unit (that needs a new unit)
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think.
Joints and surfaces we work on
- Window sills
- Composite doors
- Aluminium frames
- Patio & French doors
- uPVC windows
- Timber windows & doors
How to look after the new joints
So the new joints stay in good condition:
- Keep timber frames painted
- Walk round the house once a year and look at the joints
- Keep solvents and bleach off the sealant
- Make sure the drainage slots aren’t blocked
Have a look at the joints once a year, ideally after winter. Small splits are simple to catch before they leak, and if anything looks wrong, just ring 0345 464 0079 or email us.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and heat escapes around the frame. A new joint closes it up.
Different surfaces, different methods
Window sills
Masonry sills can have joints where water gets in, including the one between the sill and the frame above. We seal those with a sealant suited to masonry.
Timber windows & doors
Older timber windows in stone or brick can suit sand mastic rather than modern sealant. We will tell you which suits your home.